Python asyncio

A standard library module for writing high-performance concurrent code using the async/await syntax to manage I/O-bound tasks.

Asyncio delivers a single-threaded event loop designed to manage cooperative multitasking for I/O-bound applications. It eliminates the memory overhead of OS-level threads (often saving megabytes per connection) while handling thousands of concurrent sockets. You will use async and await syntax to orchestrate core components: Tasks for execution, Futures for results, and Streams for low-level networking. This foundation powers high-performance frameworks like FastAPI and aiohttp (capable of processing 10,000+ requests per second on modest hardware).

https://docs.python.org/3/library/asyncio.html